DE19820174A1 - Extraction of aerosol particles from air - Google Patents

Extraction of aerosol particles from air

Info

Publication number
DE19820174A1
DE19820174A1 DE1998120174 DE19820174A DE19820174A1 DE 19820174 A1 DE19820174 A1 DE 19820174A1 DE 1998120174 DE1998120174 DE 1998120174 DE 19820174 A DE19820174 A DE 19820174A DE 19820174 A1 DE19820174 A1 DE 19820174A1
Authority
DE
Germany
Prior art keywords
cooling
block
air
cold block
aerosol particles
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
DE1998120174
Other languages
German (de)
Inventor
Frank Adler
Klaus Winsel
Walter Lisec
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MEDIUM-SENSOR INGENIEUR- UND HANDELSGESELLSCHAFT F
Original Assignee
MEDIUM SENSOR GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MEDIUM SENSOR GmbH filed Critical MEDIUM SENSOR GmbH
Priority to DE1998120174 priority Critical patent/DE19820174A1/en
Publication of DE19820174A1 publication Critical patent/DE19820174A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
    • B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
    • B01D45/14—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by rotating vanes, discs, drums or brushes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/002—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by condensation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N1/2202—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
    • G01N1/2211—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling with cyclones
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
    • G01N33/0011—Sample conditioning
    • G01N33/0016—Sample conditioning by regulating a physical variable, e.g. pressure or temperature
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N1/2202—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
    • G01N2001/222—Other features
    • G01N2001/2223—Other features aerosol sampling devices

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Immunology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Pathology (AREA)
  • Physics & Mathematics (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Biomedical Technology (AREA)
  • Molecular Biology (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

The aerosols are extracted from the atmosphere in the temperature range 0-100o C by centrifuge at up to 30,000 rpm. The assembly consists of a chilled block (5) with a pan-shaped surface. A foil (8) is held to the block (5) inner face by a spring clip (9) and vacuum (7). The block (5) has an air inlet (1) and outlet (3) and a motor with rotor (6). The cooling is effected by peltier elements or a cooling thermostat. The foil (8) is polyethylene, polypropylene, or polytetrafluroethylene.

Description

Die Erfindung betrifft ein Verfahren und eine zugehörige Vor­ richtung zur Abscheidung von Aerosolen wie sie in der Atmo­ sphäre, bei industriellen Prozessen oder bei der Atmung (Exha­ lation) der Säugetiere gebildet werden. Die gewonnenen Aeroso­ le können ohne weitere Manipulationen (z. B. Extraktion aus Filtern) analytischen Untersuchungen auf Luftschadstoffe, Ab­ luftstoffe oder biologisch aktive Verbindungen unterzogen wer­ den.The invention relates to a method and an associated before Direction for the separation of aerosols like those in the atmosphere sphere, in industrial processes or breathing (Exha lation) of mammals. The won aeroso le can be processed without further manipulation (e.g. extraction Filter) analytical investigations for air pollutants, Ab air or biologically active compounds the.

Bekannt ist eine Vorrichtung zur Gewinnung der Inhaltsstoffe der Ausatemluft aus WO 97/04310 A1 und weiter ausgestaltet durch DE 197 03 708.9, bei der auf einer dünnen Folie, die mittels Vakuum oder selbsthaftend auf der Oberfläche der Kalt­ seite eines Peltierelementes fixiert ist, das Atemkondensat sich in gefrorener Form niederschlägt. Es zeigte sich, daß die Abscheidungsrate sehr niedrig ist. Die Aerosolteilchen werden von den Kondensattröpfchen reflektiert und passieren ungehin­ dert den Kühlteil.A device for obtaining the ingredients is known the exhaled air from WO 97/04310 A1 and further developed by DE 197 03 708.9, in which on a thin film by means of vacuum or self-adhesive on the surface of the cold side of a Peltier element is fixed, the breathing condensate is reflected in frozen form. It turned out that the Deposition rate is very low. The aerosol particles will reflected by the condensate droplets and happen anyway changes the refrigerator compartment.

Deshalb wurde in DE 197 18 925.3 vorgeschlagen, nach oder auf einer Kühlfläche ein Faservlies anzuordnen, das nach DE 197 42 332.9 als Fläche oder Säule ausgebildet ist und Fang- Antikör­ per enthalten kann.For this reason, it was proposed in DE 197 18 925.3 after or on to arrange a nonwoven cooling surface, which according to DE 197 42 332.9 is formed as a surface or column and capture antibody per may contain.

Ohne Anwendung einer Kühlung beschreibt DE 197 18 924.5 eine Vorrichtung mit einem Filter unter Verwendung von Faservlies. Obwohl sich die Abscheidungsrate erhöht, verursacht das Faser­ vlies Blindwerte (Backround), die das Meßergebnis erheblich verfälschen. Auch ist ein erheblicher Aufwand zur Isolierung der abgeschiedenen Aerosolteilchen erforderlich.DE 197 18 924.5 describes one without the use of cooling Device with a filter using non-woven fabric. Although the deposition rate increases, it causes fiber non-woven blank values (backround), which significantly increases the measurement result distort. There is also a considerable effort for insulation of the separated aerosol particles required.

Der Erfindung liegt die Aufgabe zugrunde, die Aerosolgewinnung zu effektivieren, zusätzliche Arbeitsschritte bei der Proben­ aufbereitung zu vermeiden und den Nachweis geringerer Aerosol­ konzentrationen durch eine wesentlich gesteigerte Abschei­ dungsrate zu ermöglichen.The invention is based, the aerosol production to make effective additional steps in the rehearsal to avoid preparation and the detection of lower aerosol concentrations due to a significantly increased separation  enable rate.

Erfindungsgemäß wird die Aufgabe mit den Merkmalen der Patent­ ansprüche gelöst.According to the invention the task with the features of the patent claims solved.

Von entscheidender Bedeutung für die Erfindung ist die Kombi­ nation von Kühlung und Zentrifugation bei der Abscheidung der Aerosole, wodurch Abscheidungsraten von 20% erreicht werden.The station wagon is of crucial importance for the invention nation of cooling and centrifugation in the separation of the Aerosols, which achieve separation rates of 20%.

Die Erfindung soll nachstehend an einem Beispiel näher er­ läutert werden. Die zugehörige Zeichnung zeigt den prinzipiel­ len Aufbau der Vorrichtung.The invention is illustrated below using an example to be refined. The accompanying drawing shows the principle len structure of the device.

Für die Gewinnung von Atemkondensat wird der Zuluftstutzen 1 über einen 30 bis 40 cm langen Atemschlauch mit einem Mund­ stück mit Ansaugventil verbunden. Die Vorschaltung eines Atem­ schlauches verhindert weitgehend die Kontamination der Probe mit Speichel.To obtain breathing condensate, the supply air connector 1 is connected to a mouthpiece with a suction valve via a 30 to 40 cm long breathing hose. The upstream connection of a breathing tube largely prevents contamination of the sample with saliva.

Um die Folie 8 sicher in den wannenförmigen Kühlteil des Kälteblockes 5 durch Vakuum 7 fixieren zu können, ist es er­ forderlich, daß die Folie 8 mit einem Spannring 9 gehalten wird.In order to be able to fix the film 8 securely in the trough-shaped cooling part of the cold block 5 by means of vacuum 7 , it is necessary for the film 8 to be held with a clamping ring 9 .

Beim Ausatmen gelangt die aerosolhaltige Atemluft in den Spalt zwischen der auf dem Kälteblock 5 durch Vakuum 7 fixierten Folie 8 und dem mit maximal 30 000 U/min laufenden Rotor 6. Durch Wechselwirkung mit den Rotorblättern und den beschleu­ nigten Gasmolekülen werden die Aerosolteilchen beschleunigt, gegen die Kühlfläche geschleudert und an der gekühlten Fläche fixiert. Bevorzugt wird eine Kühltemperatur von -30 bis -100°C eingestellt. Nach Versuchsende wird das Eis/Kondensat 4 zusammen mit der Folie 8 entnommen und analysiert.When exhaling, the aerosol-containing breathing air gets into the gap between the film 8 fixed on the cold block 5 by vacuum 7 and the rotor 6 running at a maximum of 30,000 rpm. By interacting with the rotor blades and the accelerated gas molecules, the aerosol particles are accelerated, thrown against the cooling surface and fixed on the cooled surface. A cooling temperature of -30 to -100 ° C. is preferably set. After the end of the experiment, the ice / condensate 4 is removed together with the film 8 and analyzed.

Bevorzugt kommt eine Peltierkühlung zur Anwendung. Bei einer doppelwandigen Ausführung des Kälteblockes 5 kann auch ein Kühlthermostat mit Umwälzpumpe zum Einsatz kommen. Peltier cooling is preferably used. In the case of a double-walled design of the cold block 5 , a cooling thermostat with a circulation pump can also be used.

Analog kann bei der Isolierung von Aerosolen anderer Herkunft verfahren werden. Dazu ist lediglich eine Schlauchverbindung zwischen Aerosolquelle und Vorrichtung herzustellen.The same can be said for the isolation of aerosols from other sources be moved. This is just a hose connection between aerosol source and device.

Mit der erfindungsgemäßen Lösung werden Abscheidungsraten von 20% erreicht. Zwischen der Abscheidungsrate und der Umdrehungszahl besteht eine lineare Abhängigkeit. With the solution according to the invention, deposition rates of 20% reached. Between the deposition rate and the RPM there is a linear dependency.  

BezugszeichenlisteReference list

11

Zuluftstutzen
Supply air spigot

22nd

Motor
engine

33rd

Abluftstutzen
Exhaust port

44th

Eis/Kondensat
Ice / condensate

55

Kälteblock
Cold block

66

Rotor
rotor

77

Vakuum
vacuum

88th

Folie
foil

99

Spannring
Tension ring

Claims (4)

1. Verfahren zur Abscheidung von Aerosolen, dadurch gekenn­ zeichnet, daß die Abscheidung in Kombination von Kühlung im Bereich von 0 bis -100°C und Zentrifugation mit maximal 30 000 U/min. erfolgt.1. A method for the separation of aerosols, characterized in that the separation in combination of cooling in the range from 0 to -100 ° C and centrifugation at a maximum of 30,000 rpm. he follows. 2. Vorrichtung zur Durchführung des Verfahrens, dadurch ge­ kennzeichnet, daß die Vorrichtung aus einem Kälteblock (5) mit wannenförmiger Kühlfläche, einer durch einen Spannring (9) ge­ haltenen und durch Vakuum (7) an der Innenwandung des Kälte­ blockes (5) fixierten Folie (8), einem Zuluftstutzen (1) und Abluftstutzen (3) sowie einem Motor (2) mit Rotor (6) besteht.2. Device for performing the method, characterized in that the device from a cold block ( 5 ) with a trough-shaped cooling surface, one by a clamping ring ( 9 ) ge and by vacuum ( 7 ) on the inner wall of the cold block ( 5 ) fixed Foil ( 8 ), a supply air connector ( 1 ) and exhaust connector ( 3 ) and a motor ( 2 ) with rotor ( 6 ). 3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß der Kälteblock (5) aus Peltierelementen oder einem Kühlthermo­ stat besteht.3. Apparatus according to claim 2, characterized in that the cold block ( 5 ) consists of Peltier elements or a cooling thermo stat. 4. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die Folie (8) aus Polyethylen, Polypropylen oder Polytetra­ fluorethylen besteht.4. The device according to claim 2, characterized in that the film ( 8 ) consists of polyethylene, polypropylene or polytetra fluorethylene.
DE1998120174 1998-04-30 1998-04-30 Extraction of aerosol particles from air Withdrawn DE19820174A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1998120174 DE19820174A1 (en) 1998-04-30 1998-04-30 Extraction of aerosol particles from air

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1998120174 DE19820174A1 (en) 1998-04-30 1998-04-30 Extraction of aerosol particles from air

Publications (1)

Publication Number Publication Date
DE19820174A1 true DE19820174A1 (en) 1999-11-04

Family

ID=7866817

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1998120174 Withdrawn DE19820174A1 (en) 1998-04-30 1998-04-30 Extraction of aerosol particles from air

Country Status (1)

Country Link
DE (1) DE19820174A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107638668A (en) * 2017-11-02 2018-01-30 周艳洁 A kind of Respiratory Medicine lung capacity automatic detection and exercise device
WO2019065418A1 (en) * 2017-09-29 2019-04-04 東京エレクトロン株式会社 Sampling device
US11577258B2 (en) 2019-11-05 2023-02-14 The Johns Hopkins University Cyclone and methods of manufacture thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019065418A1 (en) * 2017-09-29 2019-04-04 東京エレクトロン株式会社 Sampling device
CN107638668A (en) * 2017-11-02 2018-01-30 周艳洁 A kind of Respiratory Medicine lung capacity automatic detection and exercise device
CN107638668B (en) * 2017-11-02 2019-05-24 刘猛 A kind of Respiratory Medicine is detected automatically with lung capacity and exercise device
US11577258B2 (en) 2019-11-05 2023-02-14 The Johns Hopkins University Cyclone and methods of manufacture thereof

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Legal Events

Date Code Title Description
8122 Nonbinding interest in granting licenses declared
8127 New person/name/address of the applicant

Owner name: MEDIUM-SENSOR INGENIEUR- UND HANDELSGESELLSCHAFT F

8139 Disposal/non-payment of the annual fee